Friend having problems with BT Home Hub

Hey,

My friend as a son viao laptop and a desktop machine both running Windows Vista. He has a BT Home Hub wireless router however when he connects to the router using the laptop the connection on the desktop gets knocked off, why is this?

Maybe there's an IP address conflict? Try not using DHCP for the desktop and laptop, and assign different IP addresses within that home network's subnet (address range).

Thanks for the answer, will have to make a visit to his house to do that as he will be like "WTF"